Migrate the repo from Jira issues to GitHub issues

[AnthonyLatsis]

Now that we’ve cloned the issue database and opted out of the Jira bug tracker in favor of GitHub Issues, references to Jira issues throughout the repo can be updated accordingly.

[AnthonyLatsis]

Docs

• docs: Migrate from SR issues to GitHub issues #60026

Test Suite

• Gardening: Migrate test suite to GH issues p. 1 #60506
• Gardening: Migrate test suite to GH issues p. 2 #60522
• Gardening: Migrate test suite to GH issues p. 3 #60542
• Gardening: Migrate test suite to GH issues p. 4 #60591
• Gardening: Migrate test suite to GH issues p. 5 #60592
• Gardening: Migrate test suite to GH issues p. 6 #60617
• Gardening: Migrate test suite to GH issues p. 7 #60640
• Gardening: Migrate test suite to GH issues p. 8 #60641
• Gardening: Migrate test suite to GH issues p. 9 #60718
• Gardening: Migrate test suite to GH issues p. 10 #60761
• Gardening: Migrate test suite to GH issues p. 11 #60791
• Gardening: Migrate test suite to GH issues p. 12 #60812
• Gardening: Migrate test suite to GH issues p. 13 #60836
• Gardening: Migrate test suite to GH issues p. 14 #60840
• Gardening: Migrate test suite to GH issues p. 15 #60868
• Gardening: Migrate test suite to GH issues p. 16 #60894
• Gardening: Migrate test suite to GH issues p. 17 #60920
• Gardening: Migrate test suite to GH issues p. 18 #60921
• Gardening: Migrate test suite to GH issues p. 19 #60925
• Gardening: Migrate test suite to GH issues p. 20 #60947
• Gardening: Migrate test suite to GH issues p. 21 #60948
• Gardening: Migrate test suite to GH issues p. 22 #60951
• Gardening: Migrate test suite to GH issues p. 23 #60957
• Gardening: Migrate test suite to GH issues p. 24 #60991
• Gardening: Migrate test suite to GH issues p. 25 #60992
• Gardening: Migrate test suite to GH issues p. 26 #61130
• Gardening: Migrate test suite to GH issues p. 27 #61132
• Gardening: Migrate test suite to GH issues p. 28 #61141
• Gardening: Migrate test suite to GH issues p. 29 #61176

Standard Library

• Gardening: Migrate stdlib sources to GH issues #61289

Compiler

• Gardening: Migrate compiler sources to GitHub issues #61347

Changelog

• Gardening: Migrate CHANGELOG.md to GitHub issues #61348

Misc

• [NFC] Migrate remnant Jira issue references to GitHub issues #62355

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Credit and appreciation to @xedin for taking on the review of the entire volume of these monotonous, semiautomated changes.